A novel Pickering emulsion-based method is proposed to fabricate conductive polymer composites based on poly(p-phenylene oxide) with superior electrical performance and thermal stability. To overcome the incapability of separating high-boiling-point solvent toluene from the emulsion by traditional solvent evaporation method, supercritical CO₂ was utilized as an anti-solvent and extraction solvent. Results showed that hollow microparticles coated by carbon black were formed with an average particle size of 24.88 µm. After hot-pressing at 260 °C, segregated networks were established and the composites showed a percolation threshold of 1.85 wt%. The specimen with a carbon black loading of 9.1 wt% showed a conductivity of 78.44 ± 3.96 S/m and a tensile strength of 30.8 ± 2.8 MPa, with superior thermomechanical performance (Young’s Modulus of 2203.9 at 200 °C) and insignificant positive temperature coefficient effect (an increase in resistivity by 57.9% up to 300 °C).

提出了一种新的基于 Pickering 乳液的方法来制造基于聚对苯醚的导电聚合物复合材料，该复合材料具有优异的电性能和热稳定性。为克服传统溶剂蒸发法无法从乳液中分离高沸点溶剂甲苯的问题，超临界CO ₂用作反溶剂和萃取溶剂。结果表明，形成了炭黑包覆的中空微粒，平均粒径为 24.88 µm。在 260 °C 下热压后，形成了分离网络，复合材料的渗透阈值为 1.85 wt%。炭黑负载量为 9.1 wt% 的试样的电导率为 78.44 ± 3.96 S/m，拉伸强度为 30.8 ± 2.8 MPa，具有优异的热机械性能（200 °C 下的杨氏模量为 2203.9）和微不足道的正温度系数效应（电阻率增加 57.9%，直到 300 °C）。